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CN113207883B - Application of bisindole pyrrole compound - Google Patents

Application of bisindole pyrrole compound Download PDF

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CN113207883B
CN113207883B CN202110493094.0A CN202110493094A CN113207883B CN 113207883 B CN113207883 B CN 113207883B CN 202110493094 A CN202110493094 A CN 202110493094A CN 113207883 B CN113207883 B CN 113207883B
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formula
compound
chitinase
halogen
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CN113207883A (en
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杨青
刘田
宋永相
卢琼
鞠建华
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Dalian University of Technology
South China Sea Institute of Oceanology of CAS
Agricultural Genomics Institute at Shenzhen of CAAS
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Dalian University of Technology
South China Sea Institute of Oceanology of CAS
Agricultural Genomics Institute at Shenzhen of CAAS
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
    • A01N43/34—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom
    • A01N43/36—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom five-membered rings

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Abstract

The application relates to application of bis-indole pyrrole compounds. The bisindole pyrrole compounds have higher inhibitory activity to chitinase, and the result shows that the bisindole pyrrole compounds have inhibitory activity to chitinase OfChi-h, OfHex1, OfChtI and OfChtII; has strong insecticidal activity on agricultural pests such as armyworm, Asiatic corn borer and Spodoptera frugiperda.

Description

Application of bisindole pyrrole compound
Technical Field
The invention relates to application of a series of bisindole pyrrole compounds as chitinase inhibitors and pesticides, belonging to the technical field of biology.
Background
Chitin is a polymer of N-acetylglucosamine linked by β -1, 4-glycosidic bonds, and is second only to cellulose in nature. Chitin is widely distributed in the exoskeletons of arthropods, mollusk organs, and fungal cell walls, but is absent in plants and mammals. Chitin is an important component of organisms such as fungi and arthropods, and plays a role in protecting the organisms from external environmental stimulation and mechanical damage. However, the structural rigidity of chitin also limits the growth and division of fungi and growth and development of arthropods to some extent. In order to meet the growth and development requirements, organisms have evolved a highly efficient chitin degradation system comprising chitinase, beta-N-acetylhexosamine and polysaccharide monooxygenase. Chitinase hydrolyzes chitin to chitooligosaccharides. The chitin oligosaccharide can be further hydrolyzed by N-acetylhexosamine to generate monosaccharide. It follows that chitinase plays a crucial role in the degradation of chitin. Chitinases are widely distributed in bacteria, fungi, nematodes, plants, arthropods, and mammals, and have a very important role in many of the life activities of these organisms, including nutritional sources, cell division, pathogen invasion, insect molting, and immunoprophylaxis. The chitinase inhibitor can specifically bind and inhibit chitinase, so that the chitinase inhibitor has important influence on the normal physiological process of organisms, provides new guidance for the development of bactericides, insecticides, chemotherapeutic drugs and the like through researching the chitinase inhibitor, and has important significance on the development of life sciences, agriculture and medicines.
Insect chitinase participates in a plurality of physiological processes of insects, mainly including growth and development, innate immunity, molting and the like. The chitinase activity inhibition is likely to cause the insect to have difficulty in survival and even die, the chitinase of the insect has potential value for being developed into a green pesticide target based on the important function of the chitinase, and the small molecule inhibitor aiming at the chitinase can be used as a potential pesticide.
Disclosure of Invention
Aiming at the requirements in the field, the invention determines the inhibitory activity and insecticidal activity of various natural products from marine microorganisms on chitinase in the research on pest control, and determines that the bisindole pyrrole compound has good effect.
The application of the compound shown in the formula (I) or the formula (II) or the pharmaceutically acceptable salt thereof as an active ingredient in the preparation of chitinase inhibitors,
Figure BDA0003053150290000021
wherein R is1、R2Selected from H, C1-C4 alkyl, -C (O) OR9；R3-R8Selected from H, halogen, C1-C4 alkyl；R9Selected from hydrogen, amino, alkanol group of C1-C8, and alkylamino group of C1-C8.
Preferably: wherein R is1、R2Selected from H, -C (O) OR9；R3-R8Selected from H, halogen; r9Is selected from hydrogen, amino, alkanol group of C1-C8, and the halogen is selected from fluorine, chlorine and bromine.
Preferably: wherein R is1、R2At least one selected from-C (O) OR9；R3-R8At least one is halogen; r9Selected from hydrogen, C1-C8 alkanol groups.
Preferably: wherein R is1、R2At least one selected from-C (O) OR9；R3、R5、R7In which at least one is halogen, R4、R6、R8At least one of them is halogen; r9Selected from hydrogen.
The compound of formula (I) or formula (II) is one of the following compounds,
1.R1＝H R2＝COO- R3＝Cl R4＝Cl R5＝H R6＝H R7＝H R8＝H，
2.R1＝H R2＝COO- R3＝Cl R4＝H R5＝Cl R6＝H R7＝H R8＝H，
3.R1＝H R2＝COO- R3＝Br R4＝Cl R5＝H R6＝H R7＝H R8＝H，
4.R1＝H R2＝COO- R3＝Br R4＝Br R5＝H R6＝H R7＝H R8＝H，
5.R1＝H R2＝COO- R3＝F R4＝Cl R5＝H R6＝H R7＝H R8＝H，
6.R1＝H R2＝COO- R3＝Cl R4＝Cl R5＝F R6＝H R7＝H R8＝H，
7.R1＝H R2＝COO- R3＝Cl R4＝F R5＝Cl R6＝H R7＝H R8＝H，
8.R1＝H R2＝COO- R3＝F R4＝F R5＝Cl R6＝H R7＝H R8＝H，
9.R1＝H R2＝COO- R3＝Cl R4＝Cl R5＝Cl R6＝Cl R7＝H R8＝H，
10.R1＝H R2＝COO- R3＝Cl R4＝Cl R5＝Cl R6＝H R7＝H R8＝H，
11.R1＝COO- R2＝COO- R3＝Cl R4＝Cl R5＝H R6＝H R7＝H R8＝H，
12.R1＝COO- R2＝COO- R3＝H R4＝H R5＝H R6＝H R7＝H R8＝H，
13.R1＝COO- R2＝COO- R3＝Cl R4＝H R5＝H R6＝H R7＝H R8＝H，
14.R1＝COO- R2＝COO- R3＝H R4＝Cl R5＝H R6＝H R7＝H R8＝H，
15.R1＝COO- R2＝COO- R3＝F R4＝F R5＝H R6＝H R7＝H R8＝H，
16.R1＝COO- R2＝COO- R3＝Cl R4＝F R5＝H R6＝H R7＝H R8＝H，
17.R1＝COO- R2＝COO- R3＝Cl R4＝Cl R5＝H R6＝F R7＝H R8＝H，
18.R1＝COO- R2＝COO- R3＝H R4＝H R5＝H R6＝F R7＝H R8＝H，
19.R1＝COO- R2＝COO- R3＝H R4＝F R5＝H R6＝H R7＝H R8＝H，
20.R1＝H R2＝COOH R3＝Cl R4＝Cl R5＝H R6＝H R7＝H R8＝H，
21.R1＝H R2＝COOH R3＝Cl R4＝Cl R5＝Cl R6＝H R7＝H R8＝H，
22.R1＝H R2＝H R3＝H R4＝H R5＝H R6＝H R7＝H R8＝H，
23.R1＝H R2＝H R3＝Cl R4＝Cl R5＝Cl R6＝Cl R7＝H R8＝H，
24.R1＝COOH R2＝COO- R3＝H R4＝H R5＝H R6＝H R7＝Cl R8＝Cl，
25.R1＝COOH R2＝COOH R3＝Cl R4＝Cl R5＝H R6＝H R7＝H R8＝H，
26.R3＝Cl R4＝Cl R5＝Cl R6＝H R7＝H R8＝H，
27.R3＝Cl R4＝Cl R5＝H R6＝H R7＝H R8＝H。
preferably compound 10 or 26.
Figure BDA0003053150290000031
The chitinase is Asiatic corn borer chitinase I, Asiatic corn borer chitinase II, Asiatic corn borer chitinase h and Asiatic corn borer chitinase hex 1.
The chitinase inhibitor is used for controlling agricultural pests, such as armyworm, Asian corn borer and Spodoptera frugiperda.
The agricultural pest control means that the development of agricultural pests is delayed, the agricultural pests are refused to eat or the agricultural pests are directly killed.
Specifically, the application refers to that when the double indole pyrrole compound with the structural formula shown as I, II inhibits the activity of Asiatic corn borer chitinase I, the final concentration of the double indole pyrrole compound used in a reaction system is not lower than 10 mu M; when the activity of the Asiatic corn borer chitinase II is inhibited, the final concentration of the inhibitor used in a reaction system is not less than 10 mu M; when the activity of the ostrinia furnacalis h is inhibited, the final concentration of the ostrinia furnacalis in a reaction system is not less than 10 mu M; when the activity of the Asiatic corn borer chitinase hex1 is inhibited, the final concentration of the inhibitor used in the reaction system is not less than 10 mu M.
Specifically, in the technical scheme for controlling agricultural pests, the effective use concentration of the bisindole pyrrole compound 10 is not less than 2.5 mM.
Specifically, in the technical scheme for controlling agricultural pests, the effective use concentration of the bisindole pyrrole compound 10 is 10 mM.
The bisindole pyrrole compound has higher inhibitory activity to chitinase, and the invention provides data obtained by evaluating the inhibitory activity of an inhibitor with a structural formula shown as I, II, including data obtained by screening the inhibitor, measuring an inhibition constant and measuring a dissociation constant. The result shows that the bisindole pyrrole compound 10 has inhibitory activity on both chitinases OfChi-h and OfHex1, and the inhibitory activity on the chitinase OfChi-h is superior to that of chitinase OfHex 1; the bisindole pyrrole compound 26 has inhibitory activity on OfChi-h, OfChtI and OfChtII; the bisindole pyrrole compound 11 has inhibitory activity on OfChtI; the bisindole pyrrole compound 1 has inhibitory activity on OfChi-h; the bisindole pyrrole compound 21 has inhibitory activity on OfChi-h.
In addition, the compound shown in the structural formula I, II has strong insecticidal activity on agricultural pests. When the concentration of the compound 10 is lower than 2.5mM, the growth speed of armyworm, Asiatic corn borer and Spodoptera frugiperda is reduced, and the size is thin. At a concentration of 10mM compound 10, armyworm died completely on day four, and when died, the armyworm became thin and small, and the abdomen shriveled; the Asiatic corn borers die at a low speed, die completely on the eighth day, and have small bodies during the period, and are thin and shriveled when die; all spodoptera frugiperda died on the sixth day, and the spodoptera frugiperda died in thin and shriveled bodies.
Drawings
FIG. 1 shows K of bis (indolyl) pyrrole compound 10 on chitinaseiSchematic diagram of value determination.
Abscissa in FIG. 1 [ Compound 10 (. mu.M) ]]Represents the concentration of the compound in μ M; the ordinate 1/v represents the reciprocal of the reaction rate; in the figure, 3 straight lines correspond to the trend that 1/v changes along with the change of the compound concentration under different substrate concentrations, and the substrate concentrations are 20 mu M, 10 mu M and 5 mu M from bottom to top; the abscissa value corresponding to the intersection point of the 3 straight lines is the inhibition constant K of the corresponding compound 10 to OfChi-hiAnd was 8.5. mu.M.
FIG. 2 shows the survival curves and phenotypes of armyworm, Asiatic corn borer, and Spodoptera frugiperda on the sixth day after feeding with different concentrations of Compound 10. In fig. 2, A, B, C, E, F, G, I, J, K has the abscissa of feeding days and the ordinate of proportion, and different lines indicate larvae of different ages. D, H, L of FIG. 2 are phenotypes of armyworm, Asian corn borer, and Spodoptera frugiperda six days after feeding 0mM, 2.5mM, 10mM compound.
Detailed Description
The following non-limiting examples are presented to enable those of ordinary skill in the art to more fully understand the present invention and are not intended to limit the invention in any way. Any person skilled in the art can substitute or change the technical solution of the present invention and its inventive concept within the technical scope of the present invention. The compounds and enzymes used in the present invention are commercially available products.
The enzymes OfHex1, OfChi-h, OfChtI and OfChtII used in the examples of the invention are given in the following references: chen w.; qu M.; zhou y.; yang Q, Structural analysis of group II catalysts (ChtII) catalysts complexes of the puzzle of peptide hydrolytics interactions.J.biol.chem.2018, 293,2652-2660.
Liu T.；Chen L.；Zhou Y.；Jiang X.；Duan Y.；Yang Q.,Structure,catalysis,and inhibition of OfChi-h,the lepidoptera-exclusive insect chitinase.J.Biol.Chem.2017,292,2080-2088.
Chen L.；Zhou Y.；Qu M.；Zhao Y.；Yang Q.,Fully deacetylated chitooligosaccharides act as efficient glycoside hydrolase family 18chitinase inhibitors.J.Biol.Chem.2014,289,17932-17940.
Liu T.；Zhang H.；Liu F.；Wu Q.；Shen X.；Yang Q.Structural determinants of an insectβ-N-acetyl-D-hexosaminidase specialized as a chitinolytic enzyme.J.Biol.Chem.2011,286,4049-4058.
Example 1 determination of the inhibitory Rate of Bisindolopyrroles on the chitinases OfHex1, OfChi-h, OfChtI and OfChtII
The inhibitory activity of the compounds on chitinase OfHex1, OfChi-h, OfChtI and OfChtII was determined.
Positive control: set up 3 parallel positive controls. Under the conditions of a reaction temperature of 30 ℃ and a reaction system of 100. mu.L, 2nmol/L of chitinase and 50. mu.M MU-GlcNAc or 20. mu.M MU- (GlcNAc)2Incubating in 20mmol/L phosphate buffer solution with pH of 6.0 for 30min, adding 100 μ L0.5 mol/L sodium carbonate solution to terminate the reaction, exciting the reaction solution with excitation light with wavelength of 360nm, and measuring absorbance value at wavelength of 450 nm.
Experimental groups: set up 3 parallel experimental groups. At a reaction temperature of 30 ℃ under the conditions of 100. mu.L of the reaction system, 2nmol/L of chitinase, 10. mu.M of the compound, and 50. mu.M of MU-GlcNAc or 20. mu.M of MU- (GlcNAc)2Incubating in 20mmol/L phosphate buffer pH 6.0 for 30min, and adding 100 μ L of 0.5mol/L sodium carbonate solution to stop the reactionThe reaction solution is excited with excitation light having a wavelength of 360nm, and then the absorbance at a wavelength of 450nm is measured.
The inhibitory activity was calculated according to the following formula
Percent inhibition (positive control-experimental group)/positive control 100
The results are shown in table 1, the values are inhibition rates, and the results show that the compound 10 has inhibitory activity on both chitinases OfChi-h and OfHex1, and the inhibitory activity on the chitinase OfChi-h is superior to that of chitinase OfHex 1; compound 26 has inhibitory activity against OfChi-h, OfHex1, OfChtI and OfChtI; compound 11 has inhibitory activity against OfHex1 and OfChtI; the compound 1 has inhibitory activity on OfHex1 and OfChi-h; the compound 21 has inhibitory activity on OfChi-h.
TABLE 1
Figure BDA0003053150290000051
Figure BDA0003053150290000061
EXAMPLE 2 determination of the inhibitory constant of Bisindolylpyrroles on chitinase
The reaction set up three groups of substrate concentration gradients, MU- (GlcNAc)2As substrates, three sets of substrate concentration gradients were set up for the reaction, with final concentrations of 5. mu.M, 10. mu.M and 20. mu.M, respectively. Multiple sets of appropriate compound concentration gradients were taken at each substrate concentration for inhibitory activity assays. The reaction system is 100 MU L, the buffer environment is 20mM phosphate buffer solution, the pH value is 6.0, the final enzyme concentration is 2nM, the reaction temperature is 30 ℃, the reaction time is 30min, then 100 MU L of sodium carbonate solution with the concentration of 0.5M is added to stop the reaction, and the released MU is excited by 360nM exciting light and then the absorbance value of the MU is measured at the wavelength of 450 nM. The data were plotted by the Dixon method, and K of Compound 10 against chitinase OfChi-hiThe value was 8.5. mu.M, and the results are shown in FIG. 1, which shows that Compound 10 exhibits a certain inhibitory activity against OfChi-h.
Example 3 insecticidal Activity
The third day of mythimna separata was selected for the experiment, compound 10 dissolved in ethanol was added to the feed and fed (inhibitor concentration in feed: 0mM, 2.5mM, 10mM, 1g feed ═ 1ml water), 30 insects were fed to each group, and the living state of mythimna separata was continuously observed during feeding and recorded. As shown in FIG. 2, A, B, C, the death curves and phenotypes of armyworms after feeding with different concentrations of Compound 10 are shown. When compound 10 was fed at a concentration of 10mM, armyworms died massively on day three and all died on day four. When dead, the body of the insect is thin, small and shriveled. When compound 10 was fed at a concentration of 2.5mM, the armyworm growth rate was significantly slower and the mortality rate was higher with time. Growth returned to normal when normal feed was later fed. As shown in fig. 2D, the worm died, and was small and shriveled. When the normal feed is fed, the insects grow normally.
The Asiatic corn borers of the first day of the third year are selected for experiments, the compound 10 dissolved in ethanol is mixed into feed for feeding (the concentration of an inhibitor in the feed is 0mM, 2.5mM and 10mM, and 1g of the feed is 1ml of water), each group is fed with 30 insects, and the living state of the Asiatic corn borers is continuously observed during feeding and recorded. As shown at E, F, G in fig. 2, the death curves and phenotypes of the ostrinia nubilalis after various concentrations of compound 10 were raised; when the compound 10 is fed at a concentration of 10mM, the corn borer mortality rate is higher and higher with time, and all the corn borers die at the 8 th day. The worms were lean during feeding and significantly different from the control group with compound 10 at 0 mM. When dead, the body of the insect is thin, small and shriveled. When the compound 10 is fed at the concentration of 2.5mM, the growth speed of the corn borers is obviously slowed, the death rate is higher and higher along with the change of time, and the insects are thin and small in size in the feeding process and are obviously different from a control group with the compound 10 at the concentration of 0 mM. As shown in fig. 2H, the worm was small and shriveled when dead. When the normal feed is fed, the insects grow normally.
Experiments were carried out with Spodoptera frugiperda of the first day of three years old, and compound 10 dissolved in ethanol was added to the feed and fed (concentration of inhibitor in feed: 0mM, 2.5mM, 10mM, 1g feed ═ 1ml water), 30 worms were fed to each group, and the life state of Spodoptera frugiperda was continuously observed during feeding and recorded. FIG. 2I, J, K shows the death curves and phenotypes of Spodoptera frugiperda after rearing at various concentrations of compound 10; all Spodoptera frugiperda died at day 6 when compound 10 was fed at a concentration of 10 mM. When the compound 10 is fed at the concentration of 2.5mM, the growth speed of the corn borers is obviously slowed, the death rate is higher and higher along with the change of time, and the insects are thin and small in size in the feeding process and are obviously different from a control group with the compound 10 at the concentration of 0 mM. As shown in L in FIG. 2, the worm was small and shriveled when dead. When the normal feed is fed, the insects grow normally.

Claims (14)

1. The compound shown in the formula (I) or the formula (II) or the application of the pharmaceutically acceptable salt thereof as an active ingredient in the preparation of a chitinase inhibitor, wherein the chitinase is Asiatic corn borer chitinase I, Asiatic corn borer chitinase II, Asiatic corn borer chitinase h and Asiatic corn borer chitinase hex 1;
Figure FDA0003495490480000011
wherein the compound of formula (I) is one of the following structures:
10、
Figure FDA0003495490480000012
20.R1＝H R2＝COOH R3＝Cl R4＝Cl R5＝H R6＝H R7＝H R8＝H，
21.R1＝H R2＝COOH R3＝Cl R4＝Cl R5＝Cl R6＝H R7＝H R8＝H，
22.R1＝H R2＝H R3＝H R4＝H R5＝H R6＝H R7＝H R8＝H，
23.R1＝H R2＝H R3＝Cl R4＝Cl R5＝Cl R6＝Cl R7＝H R8＝H，
25.R1＝COOH R2＝COOH R3＝Cl R4＝Cl R5＝H R6＝H R7＝H R8＝H；
wherein R in formula (II)3-R8Selected from H and halogen.
2. Use according to claim 1, wherein R in formula (II)3-R8Selected from H, halogen; the halogen is selected from fluorine, chlorine and bromine.
3. Use according to claim 2, wherein R in formula (II)3-R8At least one is halogen.
4. Use according to claim 3, wherein R in formula (II)3、R5、R7In which at least one is halogen, R4、R6、R8At least one of which is halogen.
5. The use according to claim 1, the compound of formula (II) being one of the following compounds,
26.R3＝Cl R4＝Cl R5＝Cl R6＝H R7＝H R8＝H，
27.R3＝Cl R4＝Cl R5＝H R6＝H R7＝H R8＝H。
6. use according to claim 1, the compound of formula (I) or (II) being one of the following compounds:
Figure FDA0003495490480000021
7. the use according to claim 1, wherein the final concentration of formula (I) or formula (II) in the chitinase inhibitor is not less than 10 μ M.
8. The application of the compound shown in the formula (I) or the formula (II) or the pharmaceutically acceptable salt thereof as an active ingredient in controlling agricultural pests such as armyworm, Asiatic corn borer and Spodoptera frugiperda;
Figure FDA0003495490480000022
wherein the compound of formula (I) is one of the following structures:
10、
Figure FDA0003495490480000023
20.R1＝H R2＝COOH R3＝Cl R4＝Cl R5＝H R6＝H R7＝H R8＝H，
21.R1＝H R2＝COOH R3＝Cl R4＝Cl R5＝Cl R6＝H R7＝H R8＝H，
22.R1＝H R2＝H R3＝H R4＝H R5＝H R6＝H R7＝H R8＝H，
23.R1＝H R2＝H R3＝Cl R4＝Cl R5＝Cl R6＝Cl R7＝H R8＝H，
25.R1＝COOH R2＝COOH R3＝Cl R4＝Cl R5＝H R6＝H R7＝H R8＝H，
wherein R in formula (II)3-R8Selected from H and halogen.
9. The use according to claim 8, wherein R in formula (II)3-R8Selected from H, halogen; what is needed isThe halogen is selected from fluorine, chlorine and bromine.
10. The use according to claim 9, wherein R in formula (II)3-R8At least one is halogen.
11. The use according to claim 10, wherein R in formula (II)3、R5、R7In which at least one is halogen, R4、R6、R8At least one of which is halogen.
12. The use according to claim 11, the compound of formula (II) being one of the following compounds,
26.R3＝Cl R4＝Cl R5＝Cl R6＝H R7＝H R8＝H，
27.R3＝Cl R4＝Cl R5＝H R6＝H R7＝H R8＝H。
13. use according to claim 8, the compound of formula (I) or (II) being one of the following compounds:
Figure FDA0003495490480000031
14. the use of claim 8, wherein the agricultural pest control is delaying the development of agricultural pests, feeding refusing or directly killing the agricultural pests.
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